my Ford F-150 13th Generation (2015-2020) dashboard lights are flickering what's the cause

Ford F-150 13th Generation (2015-2020)

Error Codes

1-3 hours

Time

medium

Difficulty

medium

Severity

3 min read

478 words

Problem Statement

Learn how to diagnose and fix flickering dashboard lights in Ford F-150 (2015-2020). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Electrical

Estimated Time

1-3 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems to avoid shocks or shorts.
•Allow the vehicle to cool down before inspecting any electrical components.

Symptoms

•Dashboard lights flickering intermittently
•Dim or inconsistent brightness of lights
•Possible accompanying electrical issues (e.g., power windows or radio malfunction)
•Check engine light may illuminate
•Battery warning light may appear

Diagnostic Steps

1
Inspect the vehicle's battery connections for corrosion and tightness.
2
Use an OBD-II scanner to check for any stored error codes.
3
Examine the alternator output using a multimeter to ensure proper voltage.
4
Inspect the wiring harness for any signs of damage or wear.
5
Check the fuse box for any blown fuses related to the dashboard lights.
6
Test the dashboard light dimmer switch for functionality.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•OBD-II scanner
•Multimeter
•Wrench set
•Wire brush
•Fuse puller
•Visual inspection tools (flashlight)

Parts Required

•Battery terminals (if corroded)
•Alternator (if faulty)
•Fuses (as needed)
•Dimmer switch (if defective)

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Diagnostic Steps

1
Inspect the vehicle's battery connections for corrosion and tightness.
2
Use an OBD-II scanner to check for any stored error codes.
3
Examine the alternator output using a multimeter to ensure proper voltage.
4
Inspect the wiring harness for any signs of damage or wear.
5
Check the fuse box for any blown fuses related to the dashboard lights.
6
Test the dashboard light dimmer switch for functionality.

Solution

1. Preparation

Gather tools and parts needed for the repair.
Disconnect the negative terminal of the battery to ensure safety.

2. Inspect Battery and Connections

Tools Required: Wrench set, wire brush
Clean any corrosion from the battery terminals using a wire brush.
Ensure battery connections are tight and secure. If damaged, replace the terminals.

3. Test the Alternator

Tools Required: Multimeter
Connect the multimeter to the battery terminals (red to positive, black to negative).
Start the vehicle and check voltage; it should read between 13.7 to 14.7 volts. If not, the alternator may need replacement.

4. Examine Wiring and Fuses

Tools Required: Visual inspection tools (flashlight), fuse puller
Inspect the wiring harness for frays or breaks, focusing on areas that experience movement or heat.
Check the fuse box and replace any blown fuses related to the dashboard lights.

5. Test Dashboard Light Dimmer Switch

Tools Required: Multimeter
Locate the dimmer switch and disconnect it.
Use a multimeter to check for continuity when the switch is rotated. If it fails, replace the dimmer switch.